<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>商品修改页面</h1>
    <input type="text" v-model="product.id">
    <input type="text" v-model="product.title">
    <input type="text" v-model="product.price">
    <input type="text" v-model="product.num">
    <input type="button" value="修改" @click="update()">
</div>
<script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script>
  let v = new Vue({
    el:"body>div",
    data:{
      product:{
          id:"",
          title:"",
          price:"",
          num:""
      }
    },
    methods:{
        update(){
            axios.post("/update",v.product).then(function (response) {
                alert("修改成功");
                location.href="/list.html";
            })
        }
    },
      created:function () {
          axios.get("/selectById"+location.search).then(function (response) {
              v.product = response.data;
          })
      }
  })
</script>
</body>
</html>